Arq is a backup software for your Windows PC. It backs up your files securely to your cloud account or NAS. Arq Backup keeps multiple versions of your files — a backup history. So if you discover a file was corrupted or accidentally deleted, you can go back and get the old version. Back up external hard drives, NAS files, whatever you want. Arq has no limits.

Arq Backup stores your encrypted backups in a format that's open and documented. You control the backup data. Use Arq to backup to:

There's even an open-source restore tool, so you can decrypt your backup data without the Arq app if you want to. Knowing where your backups are and being able to see the data directly brings peace of mind.

It protects whichever files you tell it to back up, automatically, every hour. Backups are stored in your cloud account or NAS or SFTP server to protect against theft, ransomware, disaster. No one else can read your backups because everything is encrypted before it leaves your computer with a password only you know.

Arq Backup integrates with many different cloud providers. So if you have a cloud account with some extra space available, use it for encrypted, versioned backups of your important files. It stores your encrypted backups in a format that's open and documented.